Temporal and geographical trends in the genotoxic effects of marine sediments after accidental oil spill on the blood cells of striped beakperch (Oplegnathus fasciatus)

► We determined temporal changes of the impact of genetic toxicity caused by oil spill. ► We measured DNA damage in blood cell of striped beakperch in vitro. ► DNA damage reduced over 18-month period; sediments recovered quickly from oil pollution. ► Significant correlations between PAHs and DNA damage. ► Comet assay can be a useful tool as a biomarker in genetic toxicity of environmental monitoring.